How True does this center have to be?

[stevieb49829]

First of all, I'm assuming there is some not-quite-true in a set of Allis power-adjust rims. So where do I calculate from, and how much leeway do I have when I weld these new lug centers into the wheel hubs? I'm thinking level up from the 4 lock-mounting locations on the outside of the wheel center, and keep the face of my lug plate parallel to this level. That should keep the tires and wheels from wobbling down the road very much. The lug plate is within a 32nd of being exactly on center. I'm using my cast iron table saw as the flat surface to measure from. Is this overworking the problem?

 

[Jim.ME]

My thought is the wobble is from the rim not being 100% straight on the power adjust rails. The clamps and eccentrics aren't real precision,as far as alignment on the rails. Then add some wear on the rails and the rim won't be straight, even if the center is true. Have you tried jacking a wheel clear of the ground and with the eccentrics just barely snug, bump the rim in or out to align it? Set a wood black or something for a gauge to watch clearance between it and the sidewall as you turn the tire.

I would not cut the centers and try to weld new bolt circles in. If the weld affects the material of the centers you could have a catastrophic failure. Just my opinion.

 

[Bob Bancroft]

What are you going to put these on?

Jim.ME is absolutely correct. The fit of the rim rails on the wheels is not very precise.

 

[stevieb49829]

Putting them on a MH 101 Jr. The Allis centers are stamped out of 1/4 inch steel plate, and my lug centers are 1/4 mild plate steel. I will keep an eye on them during use to watch the welds and surrounding metal, but I don't anticipate any material failure with the limited use they will have plowing snow and dragging a back blade on the 3 point. It was this or finding a set of 6 or 8 bolt hubs that would fit my 2-3/4 diameter axles. steve